1. Product Description
The GE D20EME 0526-21170-1 is an Enhanced Ethernet Communication Module for the GE Series 90-20/D20 PLC platform. It provides TCP/IP connectivity to enable real-time data exchange between D20 PLC racks and supervisory control systems via 10/100 Mbps Ethernet.
Core Function: Industrial-grade network bridge for legacy GE automation systems.
2. Technical Specifications
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Parameter
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Specification
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Model
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D20EME 0526-21170-1 (Variant of IC652EME001)
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Interface
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10/100BASE-TX Ethernet (RJ45, auto-negotiating)
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Protocols
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GE SRTP (Primary), Modbus TCP (Limited), FTP
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Backplane Bus
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D20 Parallel Bus (5V DC @ 850mA max)
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Isolation
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1,500V AC (network-to-logic)
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Data Memory
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512 KB dual-port RAM
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LED Indicators
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PWR, ACT, LINK/SPEED, FAULT
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Operating Temp.
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-40°C to +85°C (Conformal coated for harsh env.)
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Certifications
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UL 508, cULus, CE, IEC 61131-2
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3. Series & Compatibility
- Series: GE Series 90-20 / D20 PLC Communication Modules
- Compatible Backplanes:
- D20 Baseplates: IC652BEM001, IC652BEM002
- Series 90-20 Racks: IC693CHS3xx
- Supported CPUs:
- D20 ECPU (IC652CPUxxx)
- Series 90-20 CPUs (IC693CPU3xx)
- Firmware Requirement: D20 OS90 ≥ V8.5 (GFK-1533)
4. Key Features
- Dual-Speed Ethernet: Auto-negotiates 10/100 Mbps for flexible network integration.
- Deterministic SRTP: GE’s real-time protocol for critical control data (<10ms latency).
- Non-Volatile Storage: Retains IP configuration during power loss.
- High Noise Immunity: Reinforced EMI shielding (tested to EN 61000-6-4).
- Secure Access: Password-protected FTP for firmware updates.
5. Functional Role
- Enables:
- Remote PLC programming via LogicMaster 90-30/70 or Proficy Machine Edition.
- Real-time data sharing with CIMPLICITY SCADA, iFIX HMIs, or OPC servers.
- Diagnostics/asset management via Proficy Historian.
6. Applications
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Application
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Implementation Example
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Legacy System Networking
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Connecting D20 PLCs in power substations to modern control centers
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Data Acquisition
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Logging turbine vibration data in hydroelectric plants
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Remote Monitoring
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Real-time pump status visibility in municipal water facilities
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Batch Control
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Recipe synchronization in pharmaceutical mixing tanks
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Alarm Management
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Centralized fault reporting for mining conveyor systems
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7. Industrial Deployment
- Energy: Grid protection relays, generator control
- Water Management: Floodgate control, wastewater SCADA
- Manufacturing: CNC machine monitoring, assembly line synchronization
- Transport: Rail signaling, tunnel safety systems
- Oil & Gas: Compressor station control, custody transfer metering
️ Critical Notes
- End-of-Life Status:
- Discontinued since 2012. No firmware/technical support available.
- Modern Alternative: Use RX3i PACSystems with IC695ETM001 Ethernet module.
- Protocol Constraints:
- Native SRTP requires GE software; Modbus TCP needs protocol conversion.
- Not compatible with standard IT security tools (firewalls/NAC).
- Hardware Limitations:
- Max. 4 modules per D20 rack.
- Requires dedicated IP subnet (no DHCP support).
- Wiring Compliance:
- Use CAT5e/6 shielded twisted-pair with conduit grounding per NEC/EN 50121-4.
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